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NAME | SYNOPSIS | DESCRIPTION | OPTIONS | DISCUSSION | EXTRACTED DIAGNOSTICS | ENVIRONMENT VARIABLES | GIT | COLOPHON |
GIT-FSCK(1) Git Manual GIT-FSCK(1)
git-fsck - Verifies the connectivity and validity of the objects in
the database
git fsck [--tags] [--root] [--unreachable] [--cache] [--no-reflogs]
[--[no-]full] [--strict] [--verbose] [--lost-found]
[--[no-]dangling] [--[no-]progress] [--connectivity-only]
[--[no-]name-objects] [<object>*]
Verifies the connectivity and validity of the objects in the
database.
<object>
An object to treat as the head of an unreachability trace.
If no objects are given, git fsck defaults to using the index
file, all SHA-1 references in refs namespace, and all reflogs
(unless --no-reflogs is given) as heads.
--unreachable
Print out objects that exist but that aren’t reachable from any
of the reference nodes.
--[no-]dangling
Print objects that exist but that are never directly used
(default). --no-dangling can be used to omit this information
from the output.
--root
Report root nodes.
--tags
Report tags.
--cache
Consider any object recorded in the index also as a head node for
an unreachability trace.
--no-reflogs
Do not consider commits that are referenced only by an entry in a
reflog to be reachable. This option is meant only to search for
commits that used to be in a ref, but now aren’t, but are still
in that corresponding reflog.
--full
Check not just objects in GIT_OBJECT_DIRECTORY
($GIT_DIR/objects), but also the ones found in alternate object
pools listed in GIT_ALTERNATE_OBJECT_DIRECTORIES or
$GIT_DIR/objects/info/alternates, and in packed Git archives
found in $GIT_DIR/objects/pack and corresponding pack
subdirectories in alternate object pools. This is now default;
you can turn it off with --no-full.
--connectivity-only
Check only the connectivity of tags, commits and tree objects. By
avoiding to unpack blobs, this speeds up the operation, at the
expense of missing corrupt objects or other problematic issues.
--strict
Enable more strict checking, namely to catch a file mode recorded
with g+w bit set, which was created by older versions of Git.
Existing repositories, including the Linux kernel, Git itself,
and sparse repository have old objects that triggers this check,
but it is recommended to check new projects with this flag.
--verbose
Be chatty.
--lost-found
Write dangling objects into .git/lost-found/commit/ or
.git/lost-found/other/, depending on type. If the object is a
blob, the contents are written into the file, rather than its
object name.
--name-objects
When displaying names of reachable objects, in addition to the
SHA-1 also display a name that describes how they are reachable,
compatible with git-rev-parse(1), e.g.
HEAD@{1234567890}~25^2:src/.
--[no-]progress
Progress status is reported on the standard error stream by
default when it is attached to a terminal, unless --no-progress
or --verbose is specified. --progress forces progress status even
if the standard error stream is not directed to a terminal.
git-fsck tests SHA-1 and general object sanity, and it does full
tracking of the resulting reachability and everything else. It prints
out any corruption it finds (missing or bad objects), and if you use
the --unreachable flag it will also print out objects that exist but
that aren’t reachable from any of the specified head nodes (or the
default set, as mentioned above).
Any corrupt objects you will have to find in backups or other
archives (i.e., you can just remove them and do an rsync with some
other site in the hopes that somebody else has the object you have
corrupted).
expect dangling commits - potential heads - due to lack of head
information
You haven’t specified any nodes as heads so it won’t be possible
to differentiate between un-parented commits and root nodes.
missing sha1 directory <dir>
The directory holding the sha1 objects is missing.
unreachable <type> <object>
The <type> object <object>, isn’t actually referred to directly
or indirectly in any of the trees or commits seen. This can mean
that there’s another root node that you’re not specifying or that
the tree is corrupt. If you haven’t missed a root node then you
might as well delete unreachable nodes since they can’t be used.
missing <type> <object>
The <type> object <object>, is referred to but isn’t present in
the database.
dangling <type> <object>
The <type> object <object>, is present in the database but never
directly used. A dangling commit could be a root node.
sha1 mismatch <object>
The database has an object who’s sha1 doesn’t match the database
value. This indicates a serious data integrity problem.
GIT_OBJECT_DIRECTORY
used to specify the object database root (usually
$GIT_DIR/objects)
GIT_INDEX_FILE
used to specify the index file of the index
GIT_ALTERNATE_OBJECT_DIRECTORIES
used to specify additional object database roots (usually unset)
Part of the git(1) suite
This page is part of the git (Git distributed version control system)
project. Information about the project can be found at
⟨http://git-scm.com/⟩. If you have a bug report for this manual page,
see ⟨http://git-scm.com/community⟩. This page was obtained from the
project's upstream Git repository ⟨https://github.com/git/git.git⟩ on
2017-07-05. If you discover any rendering problems in this HTML ver‐
sion of the page, or you believe there is a better or more up-to-date
source for the page, or you have corrections or improvements to the
information in this COLOPHON (which is not part of the original man‐
ual page), send a mail to man-pages@man7.org
Git 2.9.2.574.gc6b0597 08/07/2016 GIT-FSCK(1)
Pages that refer to this page: git(1), git-fsck-objects(1), git-prune(1)